[JaxCalder]

Summary

Added function that allows merging multiple strings into a single newly allocated string.

Changes

• ****: Added declarations for and APIs
• ****: Implemented and weak symbols
• ****: Added comprehensive unit tests

API

Dmod_StrMerge (for modules)

char* result = Dmod_StrMerge(3, "Hello", " ", "World");  // "Hello World"
Dmod_Free(result);

Dmod_StrMergeEx (with explicit allocator)

char* result = Dmod_StrMergeEx(2, "my_allocator", "Hello", "World");  // "HelloWorld"
Dmod_Free(result);

Implementation details

• First pass: calculates total length of all strings (NULL strings are skipped)
• Second pass: allocates memory for the combined string + null terminator
• Third pass: copies each string sequentially into the result buffer
• Handles edge cases: NULL strings, empty strings, count <= 0